关节臂式坐标测量机热变形误差建模及补偿

doi:10.3969/j.issn.1000-1158.2019.01.11

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摘要建立了关节臂式坐标测量机(AACMM)结构参数热变形误差的运动学方程,研究了在实验温度约为20 ℃时关节臂式坐标测量机主要结构参数的温度变化规律和测量误差的变化趋势,建立了基于多元线性回归方法的热变形误差补偿模型并进行验证。实验结果表明:AACMM工作温度上升值最大可达3℃,测量误差随温度上升呈增大趋势,最大长度测量误差可达0.115 mm。实现了AACMM热变形误差补偿,平均测量误差从0.071 5 mm降到0.033 5 mm,在一定程度上提高了AACMM的测量精度。

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	罗哉
	刘晖
	崔学伟
	李冬
	田焜

关键词 ：计量学, 关节臂式坐标测量机, 热变形, 误差补偿, 多元线性回归

Abstract：The kinematic equation of the thermal deformation error of the AACMM is established. The temperature variation and the measurement error variation trend of the main structural parameters of the AACMM are studied at the experimental temperature of about 20 ℃. A thermal deformation error compensation model based on multiple linear regression method is established and validated. The results show that the AACMM operating temperature rise up to 3℃, measurement error increases with temperature tends to increase, the maximum length measurement error of up to 0.115 mm. And the thermal deformation error compensation of AACMM is realized, the average length measurement error decreased from 0.0715 mm to 0.033 5 mm. The measurement accuracy of the AACMM is improved to a certain extent.

Key words： metrology AACMM thermal deformation error compensation multiple linear regression

收稿日期: 2017-09-21 发布日期: 2019-01-07

PACS:

TB92

基金资助:国家自然科学基金(51675499,51405463); 浙江省自然科学基金(LY15E050013)

通讯作者: 刘晖 E-mail: 392102168@qq.com

作者简介: 罗哉(1979-),男,四川遂宁人,中国计量大学教授,硕士生导师,研究方向为精密测量及坐标测量技术。Email: luozai@cjlu.edu.cn

引用本文:

罗哉,刘晖,崔学伟,李冬,田焜. 关节臂式坐标测量机热变形误差建模及补偿[J]. 计量学报, 2019, 40(1): 71-77.
LUO Zai,LIU Hui,CUI Xue-wei,LI Dong,TIAN Kun. Modeling and Compensation of Thermal Deformation Error of Articulated Arm Coordinate Measuring Machine. Acta Metrologica Sinica, 2019, 40(1): 71-77.

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